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/* $OpenBSD: getoldopt.c,v 1.2 1996/06/23 14:20:36 deraadt Exp $ */
/* $NetBSD: getoldopt.c,v 1.3 1995/03/21 09:07:28 cgd Exp $ */
/*
* Plug-compatible replacement for getopt() for parsing tar-like
* arguments. If the first argument begins with "-", it uses getopt;
* otherwise, it uses the old rules used by tar, dump, and ps.
*
* Written 25 August 1985 by John Gilmore (ihnp4!hoptoad!gnu) and placed
* in the Pubic Domain for your edification and enjoyment.
*/
#ifndef lint
static char rcsid[] = "$OpenBSD: getoldopt.c,v 1.2 1996/06/23 14:20:36 deraadt Exp $";
#endif /* not lint */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int
getoldopt(argc, argv, optstring)
int argc;
char **argv;
char *optstring;
{
extern char *optarg; /* Points to next arg */
extern int optind; /* Global argv index */
static char *key; /* Points to next keyletter */
static char use_getopt; /* !=0 if argv[1][0] was '-' */
char c;
char *place;
optarg = NULL;
if (key == NULL) { /* First time */
if (argc < 2) return EOF;
key = argv[1];
if (*key == '-')
use_getopt++;
else
optind = 2;
}
if (use_getopt)
return getopt(argc, argv, optstring);
c = *key++;
if (c == '\0') {
key--;
return EOF;
}
place = strchr(optstring, c);
if (place == NULL || c == ':') {
fprintf(stderr, "%s: unknown option %c\n", argv[0], c);
return('?');
}
place++;
if (*place == ':') {
if (optind < argc) {
optarg = argv[optind];
optind++;
} else {
fprintf(stderr, "%s: %c argument missing\n",
argv[0], c);
return('?');
}
}
return(c);
}
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